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#!/usr/bin/env ruby
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copyright = '
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/* !!!! AUTOGENERATED FILE generated by other-blend.rb !!!!!
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*
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* This file is an image processing operation for GEGL
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*
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* GEGL is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 3 of the License, or (at your option) any later version.
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*
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* GEGL is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with GEGL; if not, see <http://www.gnu.org/licenses/>.
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*
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* Copyright 2006,2007 Øyvind Kolås <pippin@gimp.org>
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* 2007 John Marshall
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*
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* SVG rendering modes; see:
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* http://www.w3.org/TR/SVG12/rendering.html
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* http://www.w3.org/TR/2004/WD-SVG12-20041027/rendering.html#comp-op-prop
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*
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* aA = aux(src) alpha aB = in(dst) alpha aD = out alpha
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* cA = aux(src) colour cB = in(dst) colour cD = out colour
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*
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* !!!! AUTOGENERATED FILE !!!!!
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*/'
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a = [
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# Alias for porter-duff src-over
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# ['normal', 'cA + cB * (1.0f - aA)',
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# 'aA + aB - aA * aB'],
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# Alias for porter-duff src-over
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# ['over', 'cA + cB * (1.0f - aA)',
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# 'aA + aB - aA * aB'],
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]
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file_head1 = '
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#include "config.h"
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#include <glib/gi18n-lib.h>
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#ifdef GEGL_CHANT_PROPERTIES
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/* no properties */
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#else
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'
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file_head2 = '
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static void prepare (GeglOperation *operation)
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{
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const Babl *format = babl_format ("RaGaBaA float");
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gegl_operation_set_format (operation, "input", format);
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gegl_operation_set_format (operation, "aux", format);
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gegl_operation_set_format (operation, "output", format);
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}
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static gboolean
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process (GeglOperation *op,
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void *in_buf,
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void *aux_buf,
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void *out_buf,
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glong n_pixels,
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const GeglRectangle *roi,
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gint level)
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{
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gint i;
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gfloat * GEGL_ALIGNED in = in_buf;
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gfloat * GEGL_ALIGNED aux = aux_buf;
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gfloat * GEGL_ALIGNED out = out_buf;
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if (aux==NULL)
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return TRUE;
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'
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file_tail1 = '
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static void
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gegl_chant_class_init (GeglChantClass *klass)
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{
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GeglOperationClass *operation_class;
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GeglOperationPointComposerClass *point_composer_class;
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operation_class = GEGL_OPERATION_CLASS (klass);
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point_composer_class = GEGL_OPERATION_POINT_COMPOSER_CLASS (klass);
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point_composer_class->process = process;
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operation_class->prepare = prepare;
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'
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file_tail2 = ' gegl_operation_class_set_key (operation_class, "categories", "compositors:porter-duff");
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}
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#endif
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'
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a.each do
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|item|
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name = item[0] + ''
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name.gsub!(/_/, '-')
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filename = name + '.c'
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puts "generating #{filename}"
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file = File.open(filename, 'w')
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capitalized = name.capitalize
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swapcased = name.swapcase
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c_formula = item[1]
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a_formula = item[2]
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file.write copyright
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file.write file_head1
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file.write "
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#define GEGL_CHANT_TYPE_POINT_COMPOSER
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#define GEGL_CHANT_C_FILE \"#{filename}\"
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#include \"gegl-chant.h\"
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"
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file.write file_head2
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file.write "
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for (i = 0; i < n_pixels; i++)
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{
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gint j;
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gfloat aA, aB, aD;
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aB = in[3];
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aA = aux[3];
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aD = #{a_formula};
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for (j = 0; j < 3; j++)
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{
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gfloat cA, cB;
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cB = in[j];
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cA = aux[j];
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out[j] = #{c_formula};
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}
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out[3] = aD;
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in += 4;
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aux += 4;
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out += 4;
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}
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return TRUE;
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}
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"
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file.write file_tail1
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file.write "
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gegl_operation_class_set_keys (operation_class,
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\"name\" , \"gegl:#{name}\";
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\"description\",
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_(\"Porter Duff operation #{name} (d = #{c_formula})\"),
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NULL);
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"
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file.write file_tail2
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file.close
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end
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